Open Today Sales: 9 AM-9 PM
The 2025 GMC Sierra 2500 HD is a boldly designed truck with awe-inspiring engineering. Able to tow up to 20,000 pounds conventionally with the available 6.6L Duramax® turbo diesel V8 engine, this truck is ideal for hauling trailers. For more details on the 2025 GMC Sierra 2500 HD, keep reading this review crafted by the team at Al Piemonte Buick GMC.
Does the new GMC Sierra 2500 HD appeal to you? Find it in our inventory, pair it with a lease offer, and use our online form to schedule a test drive with us. We’re located in Elmhurst, IL, and you can plan your visit to us with our directions. If you have any questions, give us a call at (630) 832-9500 or message us online.
Navigate to a specific research section to learn more:
There are seven 2025 GMC Sierra 2500 HD trims available, each with their own unique performance capabilities and style. To learn more, head over to our comprehensive trims guide.
The 2025 GMC Sierra 2500 HD interior offers premium amenities throughout. You and your front-seat passenger will appreciate the available 16-way power-adjustable front seats, which include a massaging functionality to help wash away the stress of a long day. If you opt for the available crew cab configuration, you’ll experience best-in-class front headroom and legroom — 43.03 inches headroom and 44.53 inches legroom. In the winter, the available heated front and rear outboard seats and heated steering wheel will be much appreciated.
In addition to a dramatic silhouette and glossy shine, the 2025 GMC Sierra 2500 HD also boasts various optimized exterior features. The available trailering mirrors are designed to make towing easier with power-extension, retraction, and folding capabilities, auxiliary spot lamps, amber clearance lamps, auto-dimming upper glass, and perimeter lighting. The available MultiPro™ tailgate comes with features like key fob power release, a load stop, a fold-down inner gate that doubles as a full-width step or work surface, and an inner gate disabling feature to be used when a hitch is attached. If you’re looking to play some tunes while you get stuff done, the MultiPro tailgate audio system by Kicker® provides excellent amplification. Sierra 2500 HD SLE and SLT trims stand out with available new 20-inch wheels with a bright face and dark painted pockets.
There are two engines available for the 2025 GMC Sierra 2500 HD — the standard 6.6L V8 gas engine and available 6.6L Duramax turbo diesel V8. Both engines can be equipped with either two-wheel drive (2WD) or four-wheel drive (4WD), and they are both standard with a ten-speed Allison® automatic transmission. The 6.6L V8 gas engine produces up to 464 pound-feet of torque, while the 6.6L Duramax turbo diesel engine boasts a whopping 975 pound-feet of torque.
Engine specs are shown in the accompanying table for your quick reference.
| Engine | 6.6L V8 gas | 6.6L Duramax turbo diesel V8 |
|---|---|---|
| Horsepower | 401 HP | 470 HP |
| Torque | 464 lb.-ft. | 975 lb.-ft. |
| Drivetrain | 2WD / 4WD | 2WD / 4WD |
| Transmission | Ten-speed Allison automatic | Ten-speed Allison automatic |
If you’re looking to tow the most you can with a 2025 GMC Sierra 2500 HD, you have a couple of options. You can opt for a crew cab configuration, which allows you to tow up to 20,000 pounds when you have the 6.6L Duramax turbo diesel V8 engine under the hood. If you’re looking to maximize your fifth-wheel/gooseneck towing capabilities, you’ll need to choose the regular cab configuration, which gives you a 22,390-pound towing capacity.
There are two bed sizes and three cab sizes available for the 2025 GMC Sierra 2500 HD. The beds available are a standard bed and long bed, with the standard bed measuring in at 82.25 inches in length and the long bed having a length of 98.27 inches. Your cab options are regular, double, and crew cabs, with the regular cab seating three and the other two cabs seating up to six passengers. The regular cab is only available with the long bed, while the double cab and crew cab are available with either the standard bed or long bed.
Towing and payload capacities are highlighted in the table.
| 2025 GMC Sierra 2500 HD Cab Size | Regular | Double | Crew |
|---|---|---|---|
| Max. Conventional Trailering Capacity | 14,500 lbs. | 17,900 lbs. | 20,000 lbs. |
| Max. Fifth-Wheel/Gooseneck Trailering Capacity | 22,390 lbs. | 18,600 lbs. | 21,870 lbs. |
Take on your day with efficient access to all the technology you require in the 2025 GMC Sierra 2500 HD. The available 13.4-inch GMC Premium Infotainment System comes with Google built-in so you can reach for familiar apps without thinking about it. Live a cord-free existence thanks to standard wireless Apple CarPlay® and Android Auto™ and an available wireless charging pad. Curate sonic bliss with the available 12-speaker Bose® Premium Series sound system.
Maintain your peace of mind in the 2025 GMC Sierra 2500 HD thanks to the numerous driver assistance and safety features that are available. The Sierra HD Pro Safety suite is standard and includes features like automatic emergency braking, a lane departure warning system, and more. The available ProGrade® trailering system is engineered to improve your towing experience and includes features like hitch guidance with hitch view and an in-vehicle trailering app.
Put the new GMC Sierra 2500 HD through its paces at Al Piemonte Buick GMC. Select your favorite from our inventory, then arrange a test drive at our dealership in Elmhurst, IL. If you have any questions, give us a call at (630) 832-9500 or contact us online.